Motocross/Dirt Bike Drivetrain & Transmission Parts
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Drive Chains
Sprockets
Chain & Sprocket Kits
Clutches
Transmissions & Components
Variators
Axles & Accessories
Wheel Hubs
Chain Guide, Protection & Sliders
Sprocket Guards
Transmission Covers
Chain & Belt Adjusters
Clutch Lines
Transmission Gaskets, Seals & Bushings
Drivetrain & Transmission Bearings
Drivetrain & Transmission Mounts
Engine & Transmission Custom Covers
Chain Lubes & Cleaners
Transmission Fluids & Oils
Gear Oils
Greases
Drivetrain & Transmission Tools
Featured Brands
- BikeMaster®Replacement Chain Breaker TipUniversal Replacement Chain Breaker Tip by BikeMaster®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured...High quality at an affordable priceExpertly made from premium materials$7.35 - $7.59
- BikeMaster®Rider WrenchesUniversal Rider Wrenches by BikeMaster®. Featuring a low-profile design with both 6- and 12-point combinations, these wrenches are perfect for getting a firm grip on stubborn steering nuts, caps, or axles. Compact, they're easily...Designed to fulfill the needs of motorcyclistsState-of-the-art design and peerless quality$15.79 - $16.93
- ProTaper®Replacement Gold Master LinksUniversal Replacement Gold Master Links by ProTaper®. Designed, tested, and produced to the highest standards, ProTaper Gold Series Chains are purpose-built for today's demanding 4-stroke motorcycles and ATVs. ProTaper chains are...Premium gold series motocross chainsLightweight, ultra high strength chromoly construction$1.95 - $5.95
- Renthal®Hard Anodised Rear SprocketUniversal Hard Anodised Rear Sprocket by Renthal®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Designed to provide unrivaled value and maximum reliabilityExpertly crafted from the highest grade materials$84.11
- Renthal®Ultralight Rear ChainwheelUniversal Ultralight Rear Chainwheel by Renthal®. Quick-change rear chainwheel sprockets for Barnes Style rear hubs for flat track racing applications. This top-grade product is expertly made in compliance with stringent industry...Expertly crafted from the highest grade materialsPrecise engineering ensures the latest in quality$84.11
- Sunstar®RTG™ Sealed ChainRTG™ Sealed Chain by Sunstar®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Designed to deliver undisputed performanceWill provide a proper fit and utmost quality$149.37 - $208.53
- BikeMaster®520 Series Sprocket520 Series Sprocket by BikeMaster®. Meticulously engineered using the highest quality materials and industry leading technology to provide the best replacement sprockets for your motorcycle. BikeMaster® Rear Sprockets are machined...Designed to fulfill the needs of motorcyclistsState-of-the-art design and peerless quality$7.66 - $34.17
- ProTaper®CS4 Rear Black SprocketCS4 Rear Black Sprocket by ProTaper®. Comp Spec (CS) ATV Rear Sprockets are constructed from high-strength S460 steel, yielding the longest life at an affordable price. With only a marginal increase in weight over an aluminum sprocket,...Core-refined 655M13 nickel-chrome-molybdenum alloy steelInternally broached and precision-machined to exact tolerances$38.53
- Wiseco®Clutch Inner HubClutch Inner Hub by Wiseco®. Wiseco leads the clutch aftermarket with high performance FORGED clutch. OEM clutch components are made from inexpensive die-castings that quickly wear out and become easily notched. Wiseco offers the only...Expertly crafted utilizing advanced technologiesDesigned to provide exceptional quality and durability$291.88 - $318.00
- Acerbis®2.0 Chain Guide Block2.0 Chain Guide Block by Acerbis®. The Acerbis 2.0 Chain Guide Block easily replaces the entire OEM unit and ensures durablity and high resistance to shock and wear from the chain. Made of PA6, it is made of two parts that allow...100% PA6 contructionHighly resistant to shock and chain wear$82.68 - $83.77
- Acerbis®2.0 Chain Guide and Slider Kit2.0 Chain Guide and Slider Kit by Acerbis®. The Acerbis Guide and Slide Kit is the perfect solution for replacing the high-wear area of your bike's drivetrain. If you're looking for a quality product that will serve you for years to...Quality replacement for the stock swingarm-mounted chain sliderMeets or exceeds OEM specifications$103.38 - $104.33
- Acerbis®Chain Guide BlockChain Guide Block by Acerbis®. The Acerbis Chain Guide Block easily replaces the entire OEM unit and ensures durablity and high resistance to shock and wear from the chain. Made of PA6, it is made of two parts that allow installation...Will meet and exceed your off-road racing needsDesigned specifically for your motorcycle$82.61 - $82.68
- Acerbis®Chain SliderChain Slider by Acerbis®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading materials...Quality replacement for the stock swingarm-mounted chain sliderMeets or exceeds OEM specifications$33.36 - $44.53
- BikeMaster®Sprocket BoltsUniversal Sprocket Bolts by BikeMaster®. Quantity: 6 Pieces. Steel sprocket bolts, includes 13 mm nylock nuts. Fits most rear sprockets. This top-grade product is expertly made in compliance with stringent industry standards to offer a...Designed to fulfill the needs of motorcyclistsState-of-the-art design and peerless quality$16.19
- QuadBoss®Wheel Bearing and Seal KitWheel Bearing and Seal Kit by QuadBoss®. High-speed bearings are manufactured to ABEC-3 precision levels. Triple-lip rubber seals keep the grease in and the water and dirt out.Chevron SRI-2 grease contains rust and oxidation inhibitors (-29° C to 177° C)Double-lip type TC seals with stainless steel garter springs$12.59 - $31.32
- BikeMaster®Replacement InsertsUniversal Replacement Inserts by BikeMaster®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Designed to fulfill the needs of motorcyclistsState-of-the-art design and peerless quality$10.33 - $12.59
- BikeMaster®Wobble Extension BarsUniversal Wobble Extension Bars by BikeMaster®. Lets you get to places you couldn't before. The BikeMaster® Wobble Extension Bars allows sockets to be driven at up to 15° off vertical. These 4-piece sets are made of hardened chrome...Designed to fulfill the needs of motorcyclistsState-of-the-art design and peerless quality$20.03 - $24.60
- Lang Tools®Front Axle WrenchUniversal Front Axle Wrench by Lang Tools®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Reversible ratcheting wrench used to remove/install the front axle shaft on motorcycles equipped with a female six-point socket in the end of the axleVinyl grip prevents the wrench from scratching or marring the bike$58.84
- Lang Tools®Front Axle WrenchUniversal Front Axle Wrench by Lang Tools®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Reversible ratcheting wrench used to remove/install the front axle shaft on motorcycles equipped with a female six-point socket in the end of the axleVinyl grip prevents the wrench from scratching or marring the bike$58.84
- Lang Tools®Front Axle WrenchUniversal Front Axle Wrench by Lang Tools®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Reversible ratcheting wrench used to remove/install the front axle shaft on motorcycles equipped with a female six-point socket in the end of the axleVinyl grip prevents the wrench from scratching or marring the bike$58.84
- Lang Tools®Front Axle WrenchUniversal Front Axle Wrench by Lang Tools®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from...Reversible ratcheting wrench used to remove/install the front axle shaft on motorcycles equipped with a female six-point socket in the end of the axleVinyl grip prevents the wrench from scratching or marring the bike$58.84
- Lang Tools®Front Axle WrenchFront Axle Wrench by Lang Tools®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured from industry-leading...Reversible ratcheting wrench used to remove/install the front axle shaft on motorcycles equipped with a female six-point socket in the end of the axleVinyl grip prevents the wrench from scratching or marring the bike$58.84
- AllStar Performance®Timken Wheel Bearing GreaseTimken Wheel Bearing Grease by AllStar Performance®. High performance Standard or High Temp. Synthetic wheel bearing grease. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a...Precise manufacturing and high-grade materialsExceptional performance at a competitive price$6.99 - $25.99
- COMP Cams®Engine Assembly LubeEngine Assembly Lube by COMP Cams®. This premium product is the best way to go for those looking for the highest quality replacement that offers supreme levels of quality, performance and reliability. Designed to provide a perfect fit...Crafted from the highest grade materialsWill deliver years of reliable service$15.95 - $18.95
- Lubegard®Platinum Universal ATF ProtectantUniversal Platinum Universal ATF Protectant by Lubegard®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured...Made with the finest materials to offer premium qualityUnique design to help you show off your personal style$17.04 - $33.88
- Lubegard®Platinum Universal ATF ProtectantUniversal Platinum Universal ATF Protectant by Lubegard®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of craftsmanship. Manufactured...Made with the finest materials to offer premium qualityUnique design to help you show off your personal style$17.04 - $33.88
- Lucas Oil®Chain LubricantUniversal Chain Lubricant by Lucas Oil®. Lucas Chain Lubricant was developed to be a long lasting, all weather, all temperature lubricant and protectant for chains, sprockets, cables and open gears. It is water resistant and contains...Built to match your exact requirementsHigh quality you can rely on$7.18 - $10.49
- Lucas Oil®Chain LubricantUniversal Chain Lubricant by Lucas Oil®. Lucas Chain Lubricant was developed to be a long lasting, all weather, all temperature lubricant and protectant for chains, sprockets, cables and open gears. It is water resistant and contains...Built to match your exact requirementsHigh quality you can rely on$7.18 - $10.49
- Lucas Oil®Primary Chaincase OilUniversal Primary Chaincase Oil by Lucas Oil®. Quantity: 1 Piece. Lucas Primary Chaincase Oil is a blend of easy flowing base oils and a Lucas additive package designed to carry away more heat from the clutch plates and friction plates....Cool & QuietsDesigned for heavy duty high performance situations$8.32
- Lucas Oil®SAE 75W-90 Synthetic Transmission and Differential LubeUniversal SAE 75W-90 Synthetic Transmission and Differential Lube by Lucas Oil®. This top-grade product is expertly made in compliance with stringent industry standards to offer a fusion of a well-balanced design and high level of...Crafted to deliver unbeatable levels of qualityHigh grade materials for exceptional performance$47.04 - $147.85
Motorcycle transmission and drivetrain systems have their own peculiarities. Most bikes are equipped with a manual sequential transmission. Rather compact and lightweight, it perfectly transfers power and typically has five or six gears to shift using a foot lever. Meanwhile, such renowned companies as Honda and Aprilia try to change the game by offering models with a dual-clutch gearbox or a CVT, and they achieved considerable success. However, all the abovementioned systems are quite complex mechanisms that require regular maintenance or even repairs from time to time.
Most manual assemblies are robust enough, but over time, moving parts may start giving you trouble due to friction, corrosion, or mechanical damage. Problems with a lever, shift forks, and other components of the shifting mechanism can be accompanied with a worn-out clutch, gears, and bearings, giving the bike's owner a strong reason to make a total rebuild. In CVTs, belt replacement is arguably the most common procedure; besides the belt itself, a clutch holding/removing tool is needed, and such a job requires certain experience and skills.
When it comes to final drive, engine output can be transferred to the rear wheel in three ways – via the chain, belt, or shaft. The first way is the most widespread; it's efficient and reliable enough, although the chain tends to stretch, and sprockets also gradually wear out. Such a setup needs to be periodically tightened, cleaned, and lubed to last long; fortunately, there are plenty of corresponding tools and chemicals allowing you to easily and effectively remove old dirty grease and protect metal parts from moisture and rust. As for the belt, corrosion is not an issue at all. Considered to be a decent alternative to the chain, the belt needs almost no maintenance and works quieter and smoother.
The very early bikes used leather drive belts that didn't last long. Modern belts are way stronger and use special hydrogenated nitrile rubber (HNBR) mixtures resistant to oil and heat, polyamide fabric for reinforcement, wear-resistant polyethylene coating, and other materials enabling these parts to last almost as long as the bike itself, though you may need to check and adjust the belt's deflection. Meanwhile, chains and sprockets are considered stronger than belts & pulleys and better withstand hard acceleration. Most high-performance and superpowerful motorcycles still use them, along with some custom two-wheelers where chains allow for installing different sprockets to match the output of a modified motor.
As for shaft drive, this mechanism is extremely durable and virtually maintenance-free, under the condition that you regularly change gear oil. While refilling the case, check for the presence of metal shavings in old oil, which can be the first sign of run-down gears. Also, there must be no leaks caused by faulty seals. In terms of performance, approximately 20-25 percent of torque is lost in this kind of drive, and the system is heavier than other setups, so there is no sense to install it in small-displacement and supersport motorcycles in which extra weight is undesirable. We carry quality aftermarket parts, chemicals, and tools for any of the abovementioned systems. While many components are factory-style replacements, others have a custom finish and are used for various upgrades.